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Knowledge Master Scholar - the most efficient and effective assessment tool ever developed for self-directed education. Use 125,000 cross-referenced questions to track your mastery of over 20,000 topics. Buy it now or try our free download. (middle school to adult)

Knowledge Master Library - the entire database of 201,600 questions, emphasizing high school knowledge & skills. Order the entire Library or use the menus below to purchase questions on specific subjects.

Knowledge Master Basics - over 64,000 questions selectedfrom the Knowledge Master Library, appropriate for middle school or junior high students. Order the entire Basics or use the menus below to purchase questions on specific subjects.

Knowledge Master Elementary - asubset of the Knowledge Master Basics; more than 16,000 questions suitable for 4th, 5th and 6th graders. Order the entire elementary package or use the menus below to purchase questions on specific subjects.